djvu | 7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7

General

Target

7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe
Size

757KB
MD5

08fce76976b17eb43cf8c8c01b17410e
SHA1

491c6d335fb1e2ef5aa7ce2c2b05031ae00b1d2d
SHA256

7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7
SHA512

0a15e2025cf4838bcd9fd78fa4a5dc7c0ea97ea8a82169a34290e87d4b65ffcdbd7729351d5b6edb45769d0ef7184ba6b7968c5d307797d9bee3d22e8adbb044
SSDEEP

12288:wgMLGN5OHdMoOOWcO2E0G6GBXSZOcGAf+k5p7ahEcTrXpk:weNgTOOWiGhiOML3u9J

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

C2

http://zexeq.com/raud/get.php

Attributes

extension
.yzoo
offline_id
x2zqmFxw8ydx3wkiEeNayQ64Eyg2U5MS31sTegt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://go.wetransfer.com/t-Z4jZBpJ1EK Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0820ASdw

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 9 IoCs

resource	yara_rule
behavioral1/memory/4932-2-0x00000000025C0000-0x00000000026DB000-memory.dmp	family_djvu
behavioral1/memory/3412-3-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3412-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3412-5-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3412-6-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/3412-15-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2480-20-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2480-21-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2480-23-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3811856890-180006922-3689258494-1000\Control Panel\International\Geo\Nation	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3024	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3811856890-180006922-3689258494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\6ed62c32-8cac-4fcd-9190-53dcc2ff2843\\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe\" --AutoStart"	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
38	api.2ip.ua
39	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4932 set thread context of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4620 set thread context of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1356	2480	WerFault.exe	101

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe
3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 4932 wrote to memory of 3412	4932	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	91
PID 3412 wrote to memory of 3024	3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	95
PID 3412 wrote to memory of 3024	3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	95
PID 3412 wrote to memory of 3024	3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	95
PID 3412 wrote to memory of 4620	3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	97
PID 3412 wrote to memory of 4620	3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	97
PID 3412 wrote to memory of 4620	3412	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	97
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101
PID 4620 wrote to memory of 2480	4620	7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe	101

C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe
"C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe
  "C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:3412
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\6ed62c32-8cac-4fcd-9190-53dcc2ff2843" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:3024
- - C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe
    "C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:4620
  - - C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe
      "C:\Users\Admin\AppData\Local\Temp\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      PID:2480
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 2480 -s 220
        5⤵
        Program crash
        
        PID:1356

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2480 -ip 2480
1⤵
PID:3560

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

File and Directory Permissions Modification

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\6ed62c32-8cac-4fcd-9190-53dcc2ff2843\7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7.exe

Filesize
757KB

MD5
08fce76976b17eb43cf8c8c01b17410e

SHA1
491c6d335fb1e2ef5aa7ce2c2b05031ae00b1d2d

SHA256
7548f27174cfa25325d5181d9f499b5b407ac3e13de47fae1f339524c41400f7

SHA512
0a15e2025cf4838bcd9fd78fa4a5dc7c0ea97ea8a82169a34290e87d4b65ffcdbd7729351d5b6edb45769d0ef7184ba6b7968c5d307797d9bee3d22e8adbb044

Download Submit
memory/2480-20-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2480-21-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2480-23-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3412-3-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3412-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3412-5-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3412-6-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/3412-15-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/4620-18-0x00000000024D0000-0x000000000256A000-memory.dmp

Filesize
616KB

Download
memory/4932-1-0x0000000002460000-0x00000000024F9000-memory.dmp

Filesize
612KB

Download
memory/4932-2-0x00000000025C0000-0x00000000026DB000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads